61787253 has 16 divisors (see below), whose sum is σ = 91141632. Its totient is φ = 36918000.

The previous prime is 61787249. The next prime is 61787261. The reversal of 61787253 is 35278716.

It is not a de Polignac number, because 61787253 - 2² = 61787249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61787203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10843 + ... + 15528.

It is an arithmetic number, because the mean of its divisors is an integer number (5696352).

Almost surely, 2^61787253 is an apocalyptic number.

It is an amenable number.

61787253 is a deficient number, since it is larger than the sum of its proper divisors (29354379).

61787253 is a wasteful number, since it uses less digits than its factorization.

61787253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26456.

The product of its digits is 70560, while the sum is 39.

The square root of 61787253 is about 7860.4868169853. The cubic root of 61787253 is about 395.3359381074.

It can be divided in two parts, 6178 and 7253, that added together give a palindrome (13431).

The spelling of 61787253 in words is "sixty-one million, seven hundred eighty-seven thousand, two hundred fifty-three".